Indlela yokuhlola izinga lokunciphisa amanzi odaka?

1. Okuqukethwe yisihloko kanye nobubanzi bokusebenza

Le ndlela icacisa amathuluzi nezinyathelo zokusebenza zokunquma ukuguquguquka kodaka lukasimende.

Le ndlela isetshenziswa ekunqumeni ukuguquguquka kodaka lomlotha wentabamlilo usimende wasePortland, usimende oyinhlanganisela wasePortland, usimende ojwayelekile wasePortland oxutshwe nomlotha wentaba-mlilo, usimende we-slag wasePortland nezinye izinhlobo zikasimende eziqokwe ukusebenzisa le ndlela.

2. Izindinganiso zokubhekisela

Indlela yokuhlola amandla kasimende we-GB177

GB178 Isihlabathi esijwayelekile sokuhlolwa kwamandla usimende

I-JBW 01-1-1 Isampula elijwayelekile lokugeleza kodaka lukasimende

3. Indlela yokuthola izinga lokunciphisa amanzi odaka imi kanje:

3.1 Izinsimbi nezinto zokusebenza

A. Umxube wodaka;

B. Itafula lokugxuma (ipuleti lengilazi eliwugqinsi elingu-5mm kumele lengezwe);

I-C. Cylindrical ramming bar: yenziwe ngezinto zensimbi, ububanzi obuyi-20mm, ubude obungaba ngu-185mm;

D. Isikhunta esiyindilinga esisikiwe sekhoni kanye nesembozo sesikhunta: usayizi wesikhunta esiyindilinga esisikiwe sekhoni elisikiwe, ubude buyi-60±0.5mm, ububanzi obungaphezulu φ 70±0.5mm, ububanzi obuphansi obungu-100±0.5mm, isembozo sesikhunta kufanele sihambisane nesikhunta esiyindilinga esisikiwe sekhoni, isembozo sensimbi esincishisiwe kanye nesikhunta esisikiwe;

E. Irula (ibanga lokulinganisa 300mm) noma ama-caliper anebanga lokulinganisa elingu-300mm;

F. i-spatula.

G. Ibhalansi yezidakamizwa (enesisindo esingu-1000g, ukuzwa i-1g).

3.2. Inqubo yokuhlola

3.2.1 Kala ukusetshenziswa kwamanzi kodaka lwereferensi

A. Kala u-300g usimende kanye nesihlabathi esijwayelekile esingu-750g bese ukuthela ebhodweni lokuxuba, qala umxube, ungeze amanzi kancane ngemva kokuhlanganisa ama-5, futhi uwangeze phakathi kwama-30s. Yeka ukugqugquzela imizuzu engu-3 ngemva kokuqala umshini. Khipha udaka emaceleni bese ususa i-pan enyakazayo.

B. Ekuhlanganiseni udaka ngesikhathi esifanayo, ngendwangu emanzi sula itafula letafula le-jump, i-ramming rod, isikhunta esisikiwe se-cone kanye nesembozo sesikhunta udonga lwangaphakathi, futhi ukubeke phakathi nendawo ye-glass plate, embozwe ngendwangu emanzi.

C. Udaka oluxubekile luhlukaniswa ngokushesha lube yizingqimba ezimbili zibe isikhunta, ungqimba lokuqala lufakwe kusikhunta se-cone cishe izingxenye ezimbili kwezintathu ukuphakama, ne-ramming bar kusukela onqenqemeni kuya esikhungweni esifakwe ngokulinganayo i-ramming izikhathi eziyishumi nanhlanu, bese ilayishwa ngesendlalelo sesibili sodaka, efakwe cishe ngamasentimitha amabili ngaphezu kwesikhunta esiyindilinga, i-cylindrical rod efanayo izikhathi eziyishumi nanhlanu. Uma ulayisha isihlabathi ne-ramming, cindezela i-truncate cone die ngesandla ukuze ugweme ukunyakaza.

D. Ngemuva kokunyathela, susa ikhava yesikhunta, sebenzisa i-spatula ukuze usule udaka oluphakeme kunesikhunta esiyindilinga se-cone esinqunyiwe bese usisula sicaba, bese uphakamisa ngobumnene isikhunta esiyindilinga sibheke phezulu. Xuba izandla ngokunkenketha kwesondo ukwenza itafula lokugxuma ligxume izikhathi ezingamashumi amathathu ngenani lokukodwa ngomzuzwana.

E. Ngemva kokushaya, sebenzisa ama-caliper ukuze ulinganise ububanzi bokusabalalisa kwe-mortar bottom, futhi uthathe inani eliyisilinganiso lamadiayamitha amabili perpendicular komunye nomunye njengokusabalaliswa kodaka lapho kusetshenziswa amanzi, evezwa ngo-mm. Lapho i-diffusivity yereferensi ye-mortar ingu-140±5mm, ukusetshenziswa kwamanzi ukusetshenziswa kwamanzi kwe-reference mortar diffusivity.

3.2.2 Ngokwendlela engu-3.2.1, ukusetshenziswa kwamanzi kodaka olune-ejenti yokunciphisa amanzi kufinyelele ku-140±5mm.

3.3. Izinga lokwehliswa kwamanzi odaka olulungisiwe lubalwa kanje:

Izinga lokunciphisa amanzi odaka (%) = (W0-W1)/ W0 ×100

Lapho, w0 - ukusetshenziswa kwamanzi (g) lapho ukusabalalisa kodaka lwereferensi kungu-140±5mm;

I-W1 — Ukusetshenziswa kwamanzi (g) lapho ukusakazwa kodaka nge-ejenti yokunciphisa amanzi kungu-140±5mm.

Inani lesilinganiso sokunciphisa amanzi yinani lencazelo ye-arithmetic lamasampuli amathathu.